View source for Channelization (roads)

{{Short description|Concept in traffic engineering}}
{{No footnotes|date=August 2018}}

'''Channelization''' is a [[traffic engineering (transportation)|traffic engineering]] concept that employs the use of secondary roads, [[slip lane]] to separate certain flows of traffic from the main traffic lanes. The method came into favor in the [[United States]] in the 1950s. One of the most effective and efficient methods of controlling the traffic on a highway is the adoption of high [[intersection (road)|intersection]] geometric design standards.

Channelization is an integral part of [[at-grade intersections]] to separate turning movements from through movements that are considered advisable. That helps greatly to reduce the intensity and frequency of loss of life and property from [[Traffic collision|crashes]]. Proper channelization increases capacity, improves safety, provides maximum convenience, and instils driver confidence. Improper channelization has the opposite effects and may be worse than none at all.

Over-channelization should be avoided because it could create confusion and worsen operations. Channelization of at-grade intersections is the separation or regulation of conflicting traffic movements into definite paths of travel by the use of [[pavement marking]]s, raised islands, or other suitable means to facilitate the safe and orderly movement of both vehicles and [[pedestrian]]s.

==Sources==
* [http://onlinepubs.trb.org/Onlinepubs/sr/sr5.pdf Channelization-The Design of Highway Intersections at Grade]. [[Transportation Research Board]], 1952 (TRB Special Report #5).
* [http://onlinepubs.trb.org/Onlinepubs/sr/sr74.pdf Channelization-The Design of Highway Intersections at Grade]. [[Transportation Research Board]], 1962 (TRB Special Report #74).
* Neuman, Timothy R. (June 1985). [http://onlinepubs.trb.org/Onlinepubs/nchrp/nchrp_rpt_279.pdf Intersection Channelization Design Guide]. [[Transportation Research Board]] (National Cooperative Highway Research Program Report NR279). {{ISBN|0-309-03864-2}}.

{{Road junction types}}

{{road-stub}}

[[Category:Road junction types]]